{"id":"CVE-2026-105090","published":"2026-10-03T02:17:18.370","lastModified":"2026-10-06T16:08:27.613","description":"Formbricks before 5.4.4 and 6 before 6.0.1 allows stored XSS. The survey-level Custom Head Scripts feature did not enforce the documented Manage permission boundary. A workspace member holding only readWrite permission could configure Custom Head Scripts on a survey, an operation the documentation restricts to the Manage role. Because the configured scripts execute in the authenticated browser session of any user who opens the affected survey, a lower-privileged member can run arbitrary JavaScript (stored cross-site scripting) in the session of higher-privileged users. Fixed versions require Manage access to modify survey Custom Head Scripts.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-863"],"vendors":[],"products":[],"references":[{"url":"https://github.com/formbricks/formbricks/pull/9432","tags":[]},{"url":"https://github.com/formbricks/formbricks/releases/tag/5.4.4","tags":[]},{"url":"https://github.com/formbricks/formbricks/releases/tag/6.0.1","tags":[]},{"url":"https://www.sec4check.pl/blog/posts/cve-formbricks-broken-access-control-stored-xss-custom-head-scripts.html","tags":[]},{"url":"https://www.sec4check.pl/blog/posts/cve-formbricks-broken-access-control-stored-xss-custom-head-scripts.html","tags":[]}],"exploitRefs":[{"url":"https://github.com/formbricks/formbricks/pull/9432","tags":[]},{"url":"https://github.com/formbricks/formbricks/releases/tag/5.4.4","tags":[]},{"url":"https://github.com/formbricks/formbricks/releases/tag/6.0.1","tags":[]}],"hasPoc":true,"ai":null}